Paper-feed mechanism.



A. c. ROEBUCK.

PAPER FEED MECHANISM. APPLICATION FILEDJUNE1,1915.

Patented Dec. 5, 1916.

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tttll C. ROEBUCK, F WOODSTCK, ILLINUIS, ASSIGNOR TO WOODSTOCK TYPEWRITERCMPANY, OF WOODSTQCK, ILLTNOIS, A CORPOBATION'OF ILLTNOIS.

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Specication of Letters Patent.

The principal object of the invention is l to provide an improvedconstruction, combination and arrangement' of parts for holding, feedingland adjusting the paper with respect to, the platen.

@ther objects' will appear hereinafter.

Tn the fdravi-ngs, Figure 1 is a front ele- -vation of a portion of` atypewriter platen and the parts appertaining to this invention, and Fig.2 is a sectional View of part of the mechanism shown by Fig. 1.

Tn a typewriter the paper apron which extends under the platen ispressed yieldingly against the platen for the purpose of holding thepaper in position with respect to the platen. Means is also provided forwithdrawing the apron from the platen'and for permitting the apron tomove yieldingly away from the platen to accommodate various thicknessesof paper.- In the present construction a platen 1 is rotatably mountedin end plates 2 of a typewriter' sub-'carriage which are held togetherby bars 3, 4 and 5. A rotatable bar 6 is .also mounted in the end.plates 2, and pivoted on one' of the end plates is an operating lever 7which is connected to the bar 6' for oscillating it by means of a link 8and an arm 9 secured tothe bar 6.

Apaper apron 10 isbent to substantially conform to the curvature of theplaten and has depending ears 11 at the rear in which a shaft 12ismounted, and depending ears 13 at the forward end in which a shaft14is mounted. Mounted .upon these shafts are paper feeding rollers beingsuitably spaced apart as by means of vsleeves 17. lintermediate the ears11 and 13 are depending ears 18 each of 'which is formed 'with a slottedperforation, and connected to the 'rotatablebar 6 are arms 19 Which'areeach loosely 'secured to one of the ears 18 by means of a fasteningdevice 20. Pivotally mounted on the front shaft 14 is a plate 21 whichis pressed yieldingly against the platen by means of a coil spring 22 ateach end vof and surrounding the shaft 14. This plate may be providedwith graduations, as shown in Fig. 1, for determining the length andposition of the printing line.

Secured to the .frame bar 4 is an abutment 22 through which anadjustable screw 23 is threaded with a projection 24 at its inner endabout -which a loop 25 of a spring 26 is passed fdr holding the springin position. This spring 26 is also wound about the bar 6 and hasanother bent extremity 27 whichbears directly against the paper apron 10adjacent the ear 18 at eachend of the apron, the extremity beingbent/aroundv the ear.

A paper table 28 is pivoted in the end plates 2 at the rear of theplaten and bears normallyyagainst one of 'the frame bars 3 so that itforms an extension and guide for directingthe paper between the paperapron and the platen. The paper apron is formed With openings throughwhich 4the rollers 15 and 16 extend so that'when paper is insertedbetween the apron and the platen it is engaged by the rollers and theapron is forced away from the platen against the tension of the spring26. With the spring bearing against the apron intermediate of therollers and- 16 it is obvious that the spring 26 will press either thefront or back rollers'separately against the platen or will press themboth against the platen through 'the apron itself, and the plate.21`whioh is pivoted on the front shaft 14 will be pressed by its springin the direction of the platen regardless of the position of the frontor rear ofthe apron,ithus assisting in holding the bottom edge of thepaper against the platen when it is desired toprint a line adjacent thebottom of the sheet.

The construction is very simple, inexpensive, and unlikely to get out oforder. The tension of each spring may be easily varied, and theextremity of the spring which bears directly against the apron may beeasily bent to change the point off actual contact with the apron, thusvarying the point of application either to the front or rear of thepoint`- shown in Fig. 2. Tn this way the pressure of the front and rearrollers may easily be varied.

What T claim is:

1. In a typewriter, a platen, a paper apron Patented weckt, 1916. l

"extending thereunder, a movable support for the apron comprising a rockshaft and arms on the' shaft. loosely connected with the apron, a iixedabutment, and a spring having one end supported by the abutment andtheother end bearing directly upon the apron to press it toward the platen.

` 3. In a typewriter,`a platen, a paper apron extending thereunder, a*movable support for the apron comprising a rock shaft and arms securedto the rock shaft having a loose connection with the apron, an abutmentadjacent'each end of theapron, and a spring having one end supported bythe abutment' and the other bearing directly against the under side ofthe apron.

4. In a typewriter, aplaten, a paper apron extending thereunder, amovable support for the apron comprising a rock shaft and arms securedthereto loosely connected withv the apron, an abutment adjacent each endof the, apron, an adjusting screw threaded in the abutment, and springsone at each end of the apron having one `looped end in engagement withthe adjusting screw and the other end bearing against the paper apron.,a a

5. In a typewriter, a platen, a paper apron extending theremder, asupport for the apron comprising a rockshaft, arms secured to the rockshaft having va loose' connection with the paper apron adjacent theends, a fixed abutment and adjacent each end ,of the paper apron, yanadjusting screw threaded in the abutment, a spring wound about the shaftat each lend having one extremity engaged by theadjusting screw in theabutment and having the other end extending along one of the saidarmsand bearing directly upon the under side of the apron, a pivoted lin erlever, and a link connecting the finger ever to .oscillate the. rockshaft whereby the apron maybe moved yieldingly away from the-platenagainst the tension of the said spring when the loose connection istaken `up. j j

G. ,Paper feeding mechanism comprising a platen, a paperl apronextending there- I 'under' having ears bent downwardly at the front,rear and at an intermediate point at both-,ends of the apron, front andrear paper feedl rollers mounted' respectively in the front andrear-dependingl'ears andadapted to bear against the platen, meanstosloosely engage the interme iate ears of the apron to move it bodilyaway from the platen, and a single spring adjacent each end of the apronbearing directly upon the under side of the apron at a" point adjacentthe intermediate ears tending to press the entire apron in contact withthe platen.

7. Paper feeding mechanism comprising a platen, a paper apron extendingthereunf der having ears bent downwardly at the front, rear and at anintermediate oint adjacent the ends of the apron and with openingsthrough the apron in line with the front and rear ears, a shaft mountedin the rear ears, feed rollers mounted on the shaft, another shaftmounted in the front ears, feed rollers mounted thereon and spacedapart, a spring-pressed plate mounted on the front shaft the upper edgeof which bears against the platen, means for moving the apron bodilytoward and from the platen comprising a rock shaft, arms secured theretohavlng a loose connection with the intermediate depending ears of theapron, a lever, means connecting the lever to rock the shaft, anabutment xed adjacent each end of-the apron, an adjusting vscrewthreaded in each abutment, and a the platen, a movable support for theapron having a loose connection with it intermediate the front and rear,and a spring having a bendable end to engage the under side of the apronand press it toward the platen, the end being bendable to vary the pointof application intermediate the front and rear thereby varying thepressure on the front and rear paper rolls.

9. In a typewriter, a platen, a paper apron extending thereunder, meansloosely connected to each end of the apron for withdrawing it from theapron, a fixed abutment below the apron, and a spring extending betweenthe abutment and the apron tending to press it against the platen.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 28th day of May, A. D.1915.

ALVAH C. ROEBUCK.

IVitnesses L. E. HoUsHoLDER, G. AUSTIN.

